Xiaoyan Zhang, MD
NPI 1891873402 · Ophthalmology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Xiaoyan Zhang, MD is a Ophthalmology Physician provider in San Francisco, CA (NPI 1891873402).
Provider details
- NPI number
- 1891873402
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A66946 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 722 | 254 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 534 | 180 |
| Latanoprost | 523 | 204 |
| Brimonidine Tartrate | 257 | 107 |
| Dorzolamide Hcl | 141 | 68 |
| Latanoprostene Bunodbrand: Vyzulta | 134 | 54 |
| Ofloxacin | 129 | 93 |
| Brinzolamide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$747 across 13 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-22
Frequently asked questions
- What is Xiaoyan Zhang's NPI number?
- Xiaoyan Zhang's National Provider Identifier (NPI) is 1891873402, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Xiaoyan Zhang's specialty?
- Xiaoyan Zhang is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Xiaoyan Zhang located?
- Xiaoyan Zhang's practice location on file with NPPES is 2200 Ofarrell St, San Francisco, CA 94115-3357.
- What is Xiaoyan Zhang's phone number?
- The practice phone number listed in the NPPES registry for Xiaoyan Zhang is (415) 833-2000.
- Does Xiaoyan Zhang accept Medicare?
- Xiaoyan Zhang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Xiaoyan Zhang's NPI active?
- Yes — Xiaoyan Zhang's NPI (1891873402) is active in the NPPES registry as of the last update on 2021-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.